Purpose Organomineral fertilizers formulated from different organic sources have been studied for the fertilization of several crops. Filter cake is currently one of the most used sources of organic matter; however, sewage sludge also presents characteristics of agronomic interest, being one of the major environmental problems in Brazil. In this sense, the efficiency of pelletized organomineral fertilizers produced with both sources were evaluated for the development of soybean under different fertilization levels. Methods The experiment was carried out in greenhouse conditions. The soil was characterized as Red Eutrophic Oxisol. The experimental design was randomized block design in a 2 × 4 + 2 factorial scheme, corresponding to two sources of organic matter (sugarcane filter cake and treated sewage sludge), in four doses (50, 75, 100 and 125% of recommendation for soybean cultivation), as well as a mineral fertilization and no-fertilization treatments. The plant development was evaluated (stem diameter, plant height and chlorophylls a and b) at 30, 60 and 90 days after sowing. Results Organomineral fertilizers formulated from sanitized sewage sludge or sugarcane filter cake promote a higher soybean plant height in relation to mineral fertilizer, especially after the middle of the crop cycle. The level of fertilization referring to 75% of the recommended dose for soybean, when made with sanitized sewage sludge or filter cake, resulted in large stem diameter in relation to mineral fertilization. Conclusion Organomineral fertilizers based on sanitized sewage sludge or filter cake promote increases in soybean characteristics up to 90 days.
(Dnline) vitamins A, B1, B2, B5 and C, fibers and minerals, besides its low caloric power (Alvarenga & Coelho, 2013). High quality fruit production depends on environmental factors such as light and weather, besides farming practices, and genetic variability among the materials is a strategy for crop improvement (Causse et al., 2003). Horticultural products quality is associated with its integrity, flavor and texture, interrelated to other physical, chemical and nutritional properties (Chitarra & Chitarra, 2005). Quality and quantity attributes such as sugar quantity, soluble solid rates, acidity, pH and firmness are common in tomatoes consumed in houses and also for the fruits directed to industrial processing, and they may be compared between progenies (Quilot-Turion & Causse, 2014). Fruit shape and size, as well as its firmness, pericarp thickness, humidity rate, juice viscosity, soluble solid and total titratable acidity relation promote variations on physicochemical and nutritional quality of tomato product fruit (Siddiqui et al., 2015). According to Riahi et al. (2009), Olahy et al. (2011), Domínguez et al. (2012) quality attributes like fruit color and firmness, pH, titratable acidity, soluble solids, vitamin C, lycopene, phenolic compounds, are dependent of the cultivar. Dther factors which influence those variables are environmental conditions, fertilization, agronomic practices of farming and after-harvest storage (
O preparo do solo pode contribuir para a melhoria das condições físicas e químicas objetivando o adequado desenvolvimento da cultura da cana-de-açúcar. O objetivo foi avaliar a interferência de diversos tipos de preparo de solo e do plantio direto nas características agronômicas e produtividade da cana-de-açúcar em uma área de reforma. O experimento foi conduzido no município de Goianésia (GO) em um Latossolo Vermelho-Amarelo de textura média, utilizando-se a variedade IAC 87-3396. O delineamento experimental utilizado foi o de blocos casualizados com seis tratamentos e quatro repetições. Os tratamentos foram: T1) dessecação + calcário + aração + gradagem; T2) calcário + subsolador + gradagem; T3) dessecação + calcário + plantio direto; T4) dessecação + calcário + subsolador; T5) destruidor de soqueira + calcário + subsolagem; e, T6) destruidor de soqueira + calcário + grade + aração + grade. Foram avaliados o número, diâmetro, altura e a produtividade dos colmos. Os diferentes preparos de solo não influenciaram nas características agronômicas da cana-planta. O uso de arado de aiveca associado à grade na incorporação do calcário proporciona as maiores produtividades de colmo de cana-de-açúcar. O plantio direto mostrou-se alternativa viável ao cultivo da cana-de-açúcar, por apresentar produtividade de colmo semelhante aos demais preparos do solo.
The objective of this study was to characterize genotypes of the salad-type tomato with a determinate growth habit and select genotypes resistant to the two-spotted spider mite for higher productivity and fruit quality. The experiment was conducted at the Horticultural Experimental Station (18°42’43.19” S and 47°29’55.8” W, 873 m altitude) of the Universidade Federal de Uberlândia (UFU), Monte Carmelo campus, from January to June 2018. The experimental design was in randomized blocks containing 16 treatments [12 populations of the F3RC2 generation and four controls: two commercial cultivars (Santa Clara and Rio Grande), the recurrent parent (UFU-057) and the wild species Solanum pennellii (LA-716)] with three repetitions. The accessions UFU-057F3RC210#3.6.1 and UFU-057F3RC213#2.1.2 have high potential for genetic improvement regarding resistance to the two-spotted spider mite. The genotypes UFU-13#4.4.1, UFU-7#4.7.1, UFU-7#4.3.2, UFU-13#2.5.2 and UFU-13#2.1.3 present higher acylsugar concentrations than S. pennellii, in addition to higher productivity and number of fruits per plant. It is suggested to explore combinations between those genotypes previously described with UFU-8#2.4.1 to obtain hybrids with high acylsugar concentrations, two-spotted spider mite resistance, high productivity and increased fruit mass.
Altura de planta e diâmetro de colmo em cana-de-açúcar de segundo corte fertilizada com organomineral de lodo de esgoto e bioestimulante Height of plant and thermal diameter in second cut sugar fertilized with organomineral of sewage sludge and bioestimulant
The dependence of mineral fertilizers, increasingly, has brought concern facing the increased demand and because it is a non-renewable mineral resource. The organic fertilization, exclusively, it is impractical in large scale, however, the combination of organic and mineral sources have already proved to be feasible, both from the point of view of nutrition of plants as well as in the aspect of recycling of urban and industrial waste by agriculture. This research had as objective to determine the efficiency of aorganomineral fertilizer formulated on the basis of sewage sludge in substitution of mineral fertilizer in the cultivation of sugar cane in environments with different levels of soil fertility. An experiment was conducted in greater soil fertility, in the Institute Federal Goiano– Campus, Morrinhos-GO, Brazil. The other, less soil fertility, was implanted in the ethanol industry Tijuco Valley, located in Rio do Peixe, district of Prata-MG, Brazil. The experimental design was randomized blocks in a factorial 5 x 2 +1 being five doses, with and without a biostimulant plus an additional with mineral fertilization, in four replications. The doses were in function of fertilization recommendation of planting and coverage for each environment, consisting of: 100 % of the mineral source and percentage 0; 60; 80; 100 and 120 % of organomineral fertilizer. We evaluated the productivity, tillering, diameter and height of stem in Prata-MG the different percentages of the fertilization of planting favored and increased productivity, height and stem diameter of sugar cane; the use of biostimulants not contributed to increase crop yield. In Morrinhos-GO, the different percentage of planting fertilization did not increase the productivity, tillering, height and diameter of the sugarcane stem; the use of biostimulants increases the productivity yield of sugarcane. Organomineral fertilizer based on biosolids is similar to fertilization with mineral fertilizer in environments.
A acidez do solo é fator limitante na agricultura, pelo fato da mesma indisponibilizar o fósforo na solução do solo e influenciar na dinâmica dos demais nutrientes no solo. A utilização de silicato de cálcio (Ca) e magnésio (Mg) fornece silício (Si) e corrige a acidez do solo aumentando a produtividade. O objetivo do estudo foi observar a produção do quiabeiro e as características químicas do solo em função da aplicação de diferentes doses de silicato de cálcio e magnésio. Utilizou-se o delineamento em blocos casualizados com cinco tratamentos e cinco repetições cultivado em 2014 e 2016. O silicato de cálcio e magnésio foi aplicado ao solo nas seguintes doses: 0; 0,5; 1,0; 2,0 e 4,0 t ha-1. Foram avaliados o peso de fruto por planta, peso médio de frutos, número de frutos por planta, produtividade, e os teores de Si, Ca, Mg e pH do solo. Não há acréscimos nos componentes do rendimento e produtividade do quiabeiro com o fornecimento de silicato de cálcio e magnésio em solo com boa fertilidade. O silicato de cálcio e magnésio reduz a acidez do solo e aumenta os teores de Ca, Mg e Si disponíveis no solo.
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